Sleeping shield



FIG. 1 is a front perspective view of a sleeping shield showing my new design;

FIG. 2 is a front elevation thereof;

FIG. 3 is a rear elevation thereof;

FIG. 4 is a right side elevation thereof; and

FIG. 5 is a top plan view thereof.

The broken lines are shown for illustrative purposes only. 

The ornamental design for a sleeping shield, as shown and described. 